Mini-Concrete Trowel Attachment Assembly

ABSTRACT

An improved mini-trowel attachment assembly having a rotary stabilizer with a plurality of screw holes disposed therein with a plurality of replacement blades secured therein by a plurality of screw members. The plurality of replacement blades include at least a pair of elongated adjustable slots that allows the replacement blades to be adjusted inward of the outer peripheral edge of the rotary stabilizer. A free-wheeling self-lubricating bearing assembly having a first non-rotary bearing and spacer ring member attached to the rotary stabilizer and a second free-wheeling member attached to the first non-rotary bearing and spacer ring member that freely rotates when it engages wall structures and upstanding obstructions in concrete surfaces. Also, the elongated slots allows the replacement blades to be adjusted inward of the outer peripheral edge of the free-wheeling self-lubricating bearing assembly.

CROSS REFERENCE TO RELATED APPLICATION(S)

None

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention relates generally to a new and useful improvementin replacement finishing blades secured to a rotary disk for finishingof various viscous or plastic materials before hardening into a curedstate. More particularly, the present invention relates to an attachmentfor an angle grinder or other power movers that relieves a user from thenecessity of having to finish the surface of concrete, plaster, mortar,drywall compound, and similar viscous substances by hand. The new andimproved replacement blades includes an adjustable elongated screw slotthat receives a screw to align with a plurality of securement holes inrotary disks of various selective sizes to perfectly positionreplacement blade non-planar edges at the circular edge of the varioussize rotary disks and at the circular edge of a free rotational guidering when attached thereto to smoothly finish surface areas, surfaceedges close to wall structures, and vertical obstructions within thefinish surface. An outer peripheral surface outward of the rotary diskedges, and the free rotational guide ring when attached directly to therotary disks of varied sizes can act as a guide to prevent damage to thewall structures, and the vertical obstructions, thus eliminating theneed for any labor intensive hand finishing.

2. Description of the Related Art

It is well known in the art to utilize hand-held finishing devices thatincludes several spaced apart replacement blades made of spring-like orflexible material attached to rotating disks to finish concrete andother viscous or plastic material generally referred to as “trowelingdevices.”

Many of these spring-like or flexible replacement blade members asreferenced in prior U.S. Pat. No. 7,144,194 B2 include a smoothingnon-planar edge positioned along the circular edge of the rotating diskmember to provide sufficient flexibility to glide over a concrete andother viscous or plastic surface of the material being smoothed orfinished without digging into and damaging the material surface. Also,the rotary disk and the plurality of replacement blades are able tofinish right at wall structures and around electrical or plumbing stubbobstructions within concrete and other viscous or plastic surfaces,while allowing for smooth finishing at the wall structures and aroundthe electrical or plumbing stubb obstructions, thus eliminating the needfor any additional labor intensive hand finishing.

These troweling devices with the aforementioned replacement blades androtary disks enables a worker to finish concrete and other viscous orplastic material in small, confined spaces, or in hard to reach edges,without resorting to hand trowels.

Some hand troweling devices have elongated slots cooperating with anadjustment member for adjusting blade angles for finishing walls andcorners. Some of these slots are positioned directly in the blades andothers having adjustable slots within bracket members attached to theblades with a cooperating adjustment member for adjusting the blades todefine specific blade angles for finishing walls and corners.

Note that none of these troweling devices have replacement blades androtary disks that teaches the new and useful improvement of the presentinvention, alone or in combination with one another and/or with otherfeatures found in the following and other non-cited prior art patents.

In light of the present invention, the best prior art patents that werefound do not teach troweling devices for finishing concrete and otherviscous or plastic surfaces with a plurality of selective replacementblades having a pair of elongated slots disposed on a raised flat rearportion of the plurality of selective replacement blades for adjustablyreceiving a pair of screw members to attach and align the plurality ofselective replacement blades with a plurality of securing or threadedholes in selective rotary disk of various sizes. The elongated slotswill allow the plurality of selective replacement blades to adjustablyaccommodate rotary disks of varied sizes.

The closet prior art patents to the present invention that havereplacement finishing blades that are connected directly to a finishingplanar blade disk by screw threaded members are identified as follows:

U.S. Pat. No. 5,221,156 A teaches a concrete finishing machine having arotary disk with a plurality of threaded holes therein for attaching aplurality of replacement blades thereto by screw members for finishing aconcrete surface. The concrete machine will finish surfaces withinapproximately 3 mm. to vertical obstructions within a concrete surfacewhile providing a plate means for guiding the machine and preventingdamage to the vertical obstructions, thus eliminating the need forexpensive time consuming hand finishing.

U.S. Pat. No. 7,144,194 B2 is the referenced patent by the currentapplicant (inventor) of the instant application that is hereby beingimproved. This patent teaches a surface finishing tool having a rotarydisk with a plurality of disk securing holes disposed thereon. Thefinishing tool includes a plurality of flexible or spring-likereplacement blades having a plurality of replacement blade securingholes that are releasably secured directly to the disk securing holes byscrew members to allow the plurality of replacement blades to perfectlyalign with the circumferential edge of the rotary disk to perform asmooth and polishing action. These replacement blades are easilyreplaced with reduced labor maintenance.

Each of the replacement blades referenced in the aforementioned U.S.Pat. No. 7,144,194 B2 has a flat disk attachment portion with one ormore securing holes therethrough for receiving the above mentioned screwmembers. An intermediate portion extends from the flat disk attachmentportion, away from the rotary plane of the rotary disk. A surfacecontact portion extends from the intermediate portion, with theintermediate portion angularly disposed between the disk attachmentportion and the surface contact portion.

The intermediate portion of each replacement blade is angled away fromits disk attachment portion by about forty-five degrees (more or less),with the surface contact portion forming a slightly shallower angle withthe intermediate portion. This results in an angle between the offsetsurface contact portion of each replacement blade and the diskattachment portion, and having between four and twelve degrees (more orless) when the replacement blades are installed upon the rotary disk, asshown in FIG. 7. Also, other angles may be formed as desired, but theshallow angle of the surface contact portion of the replacement bladeswith the underlying surface forms a working surface that (so long as theplane of the rotary disk is parallel to the underlying surface) resultsin the trailing edge of each replacement blade planing over theunderlying surface to provide a smoothing and polishing action thereon.

Note that several prior art patents were found that teaches adjustabletrowels having elongated slots or channels for changing or adjustingpitch angles for smoothing out joint compound or viscous material atwall and ceiling corners.

However, this teaching is different from the improved teaching of theinstant application having an elongated slot or channel disposed on araised flat rear portion of each of the plurality of replacement bladesfor adjustably receiving a pair of screw members to attach and align theplurality of replacement blades with a plurality of manufacturedsecuring or screw holes in the rotary disk. Therefore, the elongatedslots will allow the plurality of replacement blades to adjustablyaccommodate rotary disks of varied sizes. Also, if any of the pluralityof manufactured securing or screw holes in the rotary disk aremisaligned, the elongated slot or channel will allow the plurality ofscrew members to adjustably align with any of the misalignedmanufactured securing, or screw holes within the rotary disk to securethe plurality of replacement blades to the rotary disk. This eliminatesa user from having to replace the rotary disk with the misalignedmanufactured securing, or screw holes with a new rotary disk.

Further, the adjustment of the plurality of replacement blades relativeto the elongated slots or channels will allow the blades to beselectively adjusted at the peripheral edge of the rotary disk withoutthe free-wheeling bearing guide ring being attached thereto, or adjustedat the peripheral edge of the free-wheeling bearing guide ring whenattached to the rotary disk to smoothly finish around obstructionsdisposed within a concrete finishing surface and smoothly finish at wallsurfaces without any damage thereto, while eliminating any hand trowellabor.

The above mentioned adjustable hand trowel patents that teach elongatedslots or channels for changing or adjusting pitch angles for walls orceiling corners are identified as follows:

U.S. Pat. No. 5,442,832 A teaches an adjustable trowel with a pair ofplanar blades that are hinged together along their adjacent edges andtheir complementary tabs. Each planar blades includes an arcuate bracketmember with an arcuate slot that overlaps one another. A handle having abolt hole for receiving a bolt member through the overlapping arcuateslots for adjustably securing the planar blades together by a washer andwing nut. This allows the plane blades to be adjusted to spread jointcompound at corners and placement of the trowel at ceiling and floorlines at a variety of selective smoothing angles.

U.S. Pat. No. 5,467,497 A teaches an adjustable drywall corner toolcomprising a pair of work engaging blades normally disposedsubstantially at a ninety degree angle to one another. A hinge extendsbetween mating edges of the blades. An angle changing structure iscooperatively associated with the pair of blades and designed forchanging the angle between the two blades, so that the blades will fitin an inside corner of more and less than the ninety degree angle. Ahandle extends from the angle changing structure, so that a person cangrip the handle to apply taping to the corner.

U.S. Pat. No. 5,544,830 A teaches a wall corner finishing tool (seeFIG. 1) includes a pair of integral blades connected by a living hinge.A pair of arcuate arms each has one end hingeably connected to the backof blades, and an opening extending along its length. The arms extendtoward each other and overlap. A handle is attached to the intersectionof the arms by a screw extended through the openings and into one end ofthe handle. When the screw is loosened, the arms can be slid toward oraway from each other to adjust the angle of the blades. When the bladesare positioned at a desired angle, the screw can be tightened to holdthe blades in position. The angle between the front or working surfacesof the blades can be adjusted between 20 to 340 degrees. The integralliving hinge connecting the pair of blades provides a smooth workingsurface.

U.S. Pat. No. 5,664,280 A teaches an adjustable trowel to facilitateformation of a coved corner between two structural panels comprises ablade assembly having two laterally spaced trapezoidal-shaped, rigidwing segments integrally joined along parallel inside edges by anintermediate segment which is of rectangular shape and of reducedthickness compared to the rigid wing segments to allow flexure in thearea occupied by the intermediate segment. Affixed to each of the rigidwing segments are handle mounting brackets that overlap one another andinclude an arcuate slot therein for receiving a handle mounting bolttherethrough. By tightening the bolt by a washer and wing nut the wingsare held at a selected angle to one another and with the intermediatesegment assuming a desired curvature.

U.S. Pat. No. 5,699,580 A teaches an adjustable hand trowel generallycomprises identically shaped first and second blade members,respectively, connected to each other and to a handle member. The handlemember is secured to the blade members, by a bolt and nut arrangement.Note that the first and second blade members are adjusted by slightlyloosening the bolt and nut arrangement and adjusting the intersectionangle a to the desired angle that is to the angle of the corner beingworked on.

The best prior art patents that teaches free-wheeling guide ring membersand adjustable clearance cage guide systems are identified as follows:

U.S. Pat. No. 5,221,156 A teaches a concrete finishing machine with adisk or plate with a plurality of finishing blades that is attachedthereto by a plurality of screw members as shown in FIG. 4. Also, FIG. 6shows a free-wheeling circular metal guard plate with an associatedbearing disposed about a drive shaft and located above the disk orfinishing plate with the free-wheeling and bearing action of thecircular metal guard plate is supported in column 2, lines 44-68.

U.S. Pat. No. 5,480,257 A teaches a concrete riding trowel machinehaving an adjustable guard clearance system for accommodatingobstructions. The adjustable clearance system is comprised of a separatemovable arc of trowel guard cage ring coupled to the cage or trowelframe by a displaceable coupling. Buffer wheels are mounted to the cageof the trowel for contacting a wall, allowing movement of the trowelalong the wall when the movable arc has been retracted. These bufferwheels are mounted on axles within housings. The axles are adjustablewithin slots, which are generally perpendicular to the direction oftravel of the trowel. This adjustment allows the buffer wheels to bemoved outwardly to contact the wall when the arc is retracted. Thisfacilitates finishing along the base of the wall. In other words, thetrowel can be held against the wall with the buffer wheels riding alongthe wall to ensure that the finishing blades will not strike the walland be damaged.

U.S. Pat. No. 5,658,089 A teaches a concrete hand or riding trowelmachine having an adjustable guard clearance system for accommodatingobstructions. The clearance system allows a trowel to finish a slabsurface immediately adjacent an obstacle such as a wall, column or curb.When used to finish the slab surface adjacent a wall, the presentclearance system is adapted to maintain the trowel in a spaced apartrelationship with the wall while allowing finishing of the slab surfaceimmediately adjacent the wall (See FIGS. 6 through 9). The system iscomprised of a movable wing of trowel guard cage ring coupled to thecage or trowel frame by a displaceable coupling. Preferably, the movablewing comprises an elongated flat arc. The flat arc extends from one cagering end to another cage ring end, and comprises three flat strips, afront, central and rear strips. The front strip extends outwardly fromthe longitudinal axis of one of the cage ring ends at approximatelytwenty-five degrees. Further, the central strip joins at an obtuseangle, and it is parallel to the axis of travel of trowel. The rearstrip joins the central strip oppositely to the front strip, and therear strip extends from the central strip to the other one of the cagering ends.

The movable wing may be disposed in either a deployed position, adjacentlower ring (See FIGS. 1-3, 6 and 8) or in a retracted position (SeeFIGS. 7 and 9). When deployed, the movable wing is aligned with thelower ring, and it extends between the caged ring ends. When the movablewing is retracted, an unguarded segment of the rotor blades' sweep isexposed. This unguarded segment may be deployed immediately adjacent anobstacle to facilitate finishing (See FIG. 7). During such finishing, aband slides along wall to protect segment. A buffering system preventsthe band from catching on the wall, and it also protects the wall fromchipping and discoloring. This patent is a CIP of U.S. Pat. No.5,480,257 A, which is recited above.

U.S. Pat. No. 6,019,545 A teaches a walk-behind trowel machine. Thetrowel machine includes a plurality of spaced apart finishing bladeswith an outermost tip portions (See FIG. 2) of the finishing blades.This outermost tip circumscribe a circle whose diameter is slightlyexceeded by the effective diameter of the rotatable guard. The guard isgenerally in the form of a truncated cone. It is mounted for possiblerotation so that it may be displaced when contacting an obstacle.Preferably it is suspended by and captivated between by a suspensionsystem (See FIG. 4) comprising a plurality of rollers (See FIG. 2).

When the guard is moved up against the obstacle (See FIG. 1), it canrotate relative to the trowel, and it will not mar the surface of wallsor other obstacles it may touch. Thus, when the guard is pressed againstthe obstacle (See FIG. 1), causes the lower outer ring to make contacttherewith, the guard can rotate, as each roller freely enables an upperinner ring to revolve. Thus, to an appreciable extent, forces that mightotherwise destabilize the trowel or guard, and that might otherwisecause marring of the obstacle surface, are dissipated. In other words,it should be appreciated that the guard is annular in form (See FIG. 5),occupying the space between the upper inner and lower outer rings.Support and rotation points are established by the radially spaced apartrollers contacting the upper inner ring of the annulus (i.e., ring 54).As the guard support points are substantially spaced apart from thecenter of rotation (See FIG. 5) wobbling and destabilizing forces areresisted, and more reliable trowel action results. Normally, the guarddoes not rotate (i.e., it is not power driven). However, when the guardcontacts an obstacle it rolls along smoothly, enabling the power trowelto get as close as possible to concrete surface regions immediatelyadjacent the obstacle. Therefore, the guard can rotate and roll alongany wall, for example, and the forces that destabilize conventionaltrowels in response to an obstacle contact are dissipated.

U.S. Pat. No. 6,637,974 B1 teaches a concrete surface-finishing machinehaving a protective cover. The protective cover is a cage made up of aseries of generally circular guard rails. The surface-finishing machinehas a rotating portion, which is an array of radially oriented trowelingblades that travels in a generally circular path within the protectivecover. This protective cover has a generally circular shape that coversthe rotating blade portions along its path of travel. The protectivecover further includes a pair of guard assemblies. Each guard assemblyis comprised of an arm having a first end and a second end that ispivotally connected to the protective cover. Now referring to FIGS. 1through 4, each end of the arm is rotatably connected to a pair ofrollers by an attachment assembly.

The combination of the arm and the rollers are preferably designed anddimensioned so that when a first roller contacts a second surface, theother roller is also brought into contact with the second surface. Aline, outside the dimensions of the protective cover, is then formedbetween the point of contact of the first roller and the point ofcontact of the second roller. Further movement of the surface-finishingmachine will proceed along a line defined by the points of contact ofthe pair of rollers. These rollers prevent the surface-finishing machinefrom coming into contact with the wall or secondary surface and directthe surface-finishing machine in a generally smooth path of travelparallel to the direction of the wall or secondary surface.

Also, these rollers prevent damage to the secondary surface, the surfacebeing finished, and the surface-finishing machine itself. Note that thefreedom of rotation of the rollers is increased by the inclusion ofbearings either as a part of the pair of rollers or as a part of theattachment means. The inclusions of bearings may or may not be requiredor necessary depending upon the particular use in which thesurface-finishing machine is involved.

U.S. Pat. No. 7,399,140 B1 teaches a corded power drill, but it iscontemplated that the power trowel (20) can equally be used with abattery powered drill. The power trowel (20) is chucked into the drillthe same as a drill bit would be chucked into a drill. The power trowel(20) includes a plurality of spaced apart trowel blades (80, 82, 84)disposed about a central hub (32) for smoothing out concrete. Further,the trowel blades are attached to a trowel supports (81, 83 and 85)where only support (81) is identified in this FIGS. 4-8. Referring toFIG. 3, the power trowel further includes outer bearing risers (61, 63and 65) are shown protruding from an outer ring (40). These risersinclude the outer bushings, bearings or holes (62 and 64) for the trowel(20) to pivot within. The inner bearing, bushings, or holes (70, 72 and74) are shown as broken lines in FIG. 3, where they secure the innerends of the trowel (20) and trowel supports (81, 83 and 85).

The combination trowel and trowel support are pivotably secured to thepower trowel with bushings, with outer bearings or pivot points (60).Inner bearings are not shown in FIG. 3, but the combination of outer andinner bearings support the trowel blades (80, 82, 84) and allow them topivot. The pivoting mechanism is shown and described in more detail withFIGS. 4 to 7 herein. The outer bearings, bushings exist in an outerbearing riser (61) that is welded to the outer ring or safety ring (40)that extends around the trowels to reduce the potential for harm, damageor injury from the rotating trowel blades (80, 82, 84).

A top cover (100) is shown that wraps over the sides of the blades (80,82, 84). The cover (100) is connected to the central hub 32 with abearing. The bearing allows the cover to spin independently from thetroweling blades (80, 82, 84). This is partially useful to prevent theblades from scraping a wall or the leg of a user. When the top cover(100) comes in contact with a surface the cover stops spinning andguards the blades (80, 82, 84) from extending beyond the top cover(100). The cover (100) is designed to terminate slightly above thebottom of the blades 80 to prevent from marking the toweled surface.

In operation when the cover makes contact with a surface outside of thetroweling blades (80, 82, 84) the cover (100) stops moving while theblades (80, 82, 84) continue to spin under the cover. Damage to thesurface is prevented. The cover protects walls, and the user fromaccidentally coming in contact with the blades (80, 82, 84). The topcover has vents (102) that allow excess material to be pushed throughthe vents to prevent a build-up of material between the blades (80, 82,84), safety ring (40) and the top cover (100). The ring provides abearing surface and keeps the cover centered on the hub (32).

U.S. Pat. No. 8,075,222 B2 teaches a concrete finishing apparatus forsmoothing and leveling partially set-up concrete at a support surfaceincludes a frame portion, a first concrete working member and a secondconcrete working member disposed at the frame portion. The firstconcrete working member is rotatable about a first axis of rotation thatis generally vertical when the first concrete working member issupported at a generally horizontal support surface. The second concreteworking member is rotatable about a second axis of rotation that isgenerally vertical when the second concrete working member is supportedat a generally horizontal support surface. The first and second concreteworking members engage the partially set-up concrete surface at thesupport surface and rotate about the first and second axes of rotationto process the concrete surface.

Further, the following U.S. Pat. Nos. 3,973,857 A, 4,046,483 A,5,533,830 A, 6,264,397 B1, 7,104,725 B1, 7,207,745 B2, 7,604,434 B2,7,891,906 B2, 8757,925 B2, and 2004/0018052 A1 are hereby cited to showother prior art concrete trowel finishing devices of interest.

Note that none of the above mentioned prior patents teaches the uniquepresent invention singly or in any combination thereof, which will bediscussed in greater detail in the “Summary of the Invention”, recitedbelow.

SUMMARY OF THE INVENTION

It is an object of the present invention to have replacement finishingblades as referenced in the aforementioned U.S. Pat. No. 7,144,194 B2having a flat disk attachment portion with one or more securing holestherethrough for receiving the above mentioned screw members. Anintermediate portion extends from the flat disk attachment portion, awayfrom the rotary plane of the rotary finishing disk or stabilizer. Asurface contact portion extends from the intermediate portion, with theintermediate portion angularly disposed between the disk attachmentportion and the surface contact portion. The intermediate portion ofeach replacement blade is angled away from its disk attachment portionby about forty-five degrees (more or less), with the surface contactportion forming a slightly shallower angle with the surface contactportion forming a slightly shallower angle with the intermediateportion.

This results in an angle between the offset surface contact portion ofeach replacement finishing blade and the disk attachment portion, andhaving between four and twelve degrees (more or less) when thereplacement blades are installed upon the rotary finishing disk orstabilizer, as shown in FIG. 7. Other angles may be formed as desired,but the shallow angle of the surface contact portion of the replacementfinishing blades with the underlying surface being worked (so long asthe plane of the rotary finishing disk or stabilizer is parallel to theunderlying surface) results in the trailing edge of each replacementfinishing blade planing over the underlying surface to provide asmoothing and polishing action thereon.

It is another object of the present invention to provide the pluralityof replacement finishing blades having a pair of elongated slotsdisposed on the raised flat rear portion of the plurality of replacementblades for adjustably receiving a pair of screw members to attach andalign the plurality of replacement blades with a plurality of securingor threaded holes in the rotary finishing disk or stabilizer. Theelongated slots will allow the plurality of replacement finishing bladesto be adjusted proximate the peripheral edge of rotary finishing disksof varied sizes to smoothly finish concrete surfaces or other viscousmaterial surfaces, as well, as finishing smoothly around verticalobstructions within the surface material. Note that the replacementblades and the rotary finishing disk or stabilizer may be constructedfrom diverse types of plastics and metals, if desired. Preferably, thereplacement blades are made from spring-like metal material that is ableto flex and float over a viscous surface, such as concrete for smoothingout and finishing the concrete surface.

Further, the elongated slots will allow the plurality of replacementfinishing blades to adjust and align perfectly with any misalignedmanufactured securing, or threaded screw holes within a rotary finishingdisk or stabilizer with a plurality of screw members. This eliminates auser from having to replace the rotary finishing disk or stabilizer inorder to accommodate the plurality of replacement finishing blades.

Another object of the present invention provides the screw members witha selective fine pitch thread. The selective fine thread members extendthrough the rotary finishing disk or stabilizer at a selective distanceat a top portion thereof that will prevent debris, concrete, and otherviscous or plastic material from penetrating into the threaded screwholes of the rotary disks and preventing damage to the threads that cancause loosening and wobbling of the replacement finishing bladesrelative to the rotary finishing disk or stabilizer.

A further object of the present invention provides a free-wheelingbearing guide ring assembly that is attached directly to and extendslightly beyond the outer periphery of a rotary finishing disk orstabilizer. This allows the replacement finishing blades to beselectively adjusted at and not beyond the peripheral edge of thefree-wheeling bearing guide ring assembly via the aforementionedelongated slots or channels of the replacement blades to smoothly finishconcrete or viscous surfaces around obstructions and along wallsurfaces.

The free-wheeling bearing guide ring assembly of the present inventionincludes a first member attached inward of and directly around andadjacent the outer peripheral edge of the rotary finishing disk orstabilizer. The first member is an annular non-rotating ring including afirst portion defining a plurality of spaced apart non-rotating armmembers and a second portion defining a plurality of connector screwtabs with screw securing holes disposed therein. Also, the plurality ofspaced apart non-rotating arms are integrally connected to the pluralityof connector screw tabs at a bent section and extending angularly upthere from with an integral forward end attached perpendicular to anintermediate rear inner face surface of the annular non-rotating ring.The annular non-rotating ring further includes upper and lower radialextending clip fastening members with an outward forward end having atapered or bevel portion. A plurality of screw members are provided tobe inserted via the screw securing holes of the plurality of connectorscrew tabs to securely attach the annular non-rotating ring directly toand inward of the outer peripheral edge of the rotary disk. Further, theangle of the plurality of spaced apart non-rotating arm members providesa space there below to define a clearance between the lower radialextending clip fastening member and the top of the rotary finishing diskor stabilizer.

A front outer face surface of the annular non-rotating ring having anannular self-lubricating bearing rail spacer member disposed along anintermediate portion thereof, and opposite the integral end of thenon-rotating arm that is attached to the intermediate rear inner facesurface.

Another object of the present invention provides a second member definedas an annular free-rotating bearing cover guide ring having a frontouter face surface and a rear inner face surface. The rear inner facesurface engages and encloses the front outer face surface of the annularnon-rotating ring and the bearing rail spacer member when the secondmember is secured to the upper and lower radial extending clip fasteningmembers of the first member by upper and lower fastening clips of theannular free-rotating bearing cover guide ring. The upper and lowerfastening clips of the annular free-rotating bearing cover guide ringhaving one end attached to and radially extending from the annularfree-rotating bearing cover guide ring at top and bottom portionsthereof with an outward end having an outer or bevel portion, and alower portion integrally attached to the outer tapered or bevel portionwith a radially extending outward end defining a latching fastener, suchas bead member. The outer outward forward end of the annularfree-rotating bearing cover guide ring having an inner tapered or bevelportion that aligns with and spaced from the outer tapered or bevelportion of the upper and lower radial extending clip fastening membersof the first member at the top and bottom portions thereof defining aclearance gap therebetween that will always prevent the annularfree-rotating bearing cover guide ring from hitting the top of therotary disk finishing disk or stabilizer during a concrete or viscousmaterial finishing and smoothing operation.

In a first embodiment, a fastening cavity is disposed below the topradial portion and above the bottom radial portion of the upper andlower radial extending clip fastening members of the first member. Whenthe second member, the annular free-rotating bearing cover guide ringmember, is completely attached to the first member, the annularnon-rotating ring, the upper and lower fastening clips of the annularfree-rotating bearing cover guide ring are received over the outertapered or bevel portion of the top and bottom portions of the upper andlower radial extending clip fastening members of the first member withthe fastening bead member loosely and firmly fitted within the fasteningcavity that is disposed below the top radial portion and above thebottom radial portion of the upper and lower radial extending clipfastening members of the first member.

This fastening arrangement causes the rear face of the free-rotatingbearing cover guide ring member to engage and move along the annularself-lubricating bearing rail and spacer member when a prime moverrotates the rotary finishing disk or stabilizer with the replacementfinishing blades for smoothly finishing a concrete or viscous materialsurface. Once the rear face of the free-rotating bearing cover guidering member engages the annular self-lubricating bearing rail spacermember, the clearance space defined between the inner tapered or bevelportions of the upper and lower fastening clips of the annularfree-rotating bearing cover guide ring of the second member and spacedfrom the tapered or bevel portion of the upper and lower radialextending clip fastening members of the first member at the top andbottom portions is always maintained.

This clearance space allows the annular free-rotating bearing coverguide ring of the second member to freely rotate along the annularself-lubricating bearing rail and spacer member without binding as thefastening bead member moves easily and freely within the fasteningcavity that is disposed below the top radial portion and above thebottom radial portion of the upper and lower radial extending clipfastening members of the first member. Optionally, the fastening cavitycan be omitted. The omission of the fastening cavity will allow thefastening bead of the annular free-rotating bearing cover guide ring ofthe second member to snap fit firmly against and below the top radialportion and above the bottom radial portion of the upper and lowerradial extending clip fastening members of the first member to rotatefreely thereon without binding. Note that the annular free-rotatingbearing cover guide ring of the second member is able to freely rotatealong the annular self-lubricating bearing rail and spacer memberwithout binding as the fastening bead member moves easily and freelywithout the fastening cavity as mentioned above, and as it does with thefastening cavity as discussed above.

According to another object of the present invention, a secondembodiment of the first member, the annular non-rotating ring that isattached to the rotary disk or stabilizer having at least a pair ofseparate semi-circular non-rotating ring members that abuts one anotherto form a single annular ring member when attached to the rotaryfinishing disk or stabilizer. Each of the at least a pair of separatesemi-circular non-rotating ring members has a rear inner face surface,and a front outer face surface.

Also, each of the separate semi-circular non-rotating ring membersincludes a plurality of spaced apart non-rotating arm members having aportion extending angularly up from an integral bent section with oneend integrally attached to a rear inner face surface of the separatesemi-circular non-rotating ring members and the other end integrallyattached to a plurality of connector screw tabs in the same manner asthe annular non-rotating ring of the first embodiment as discussedabove, and the plurality of connector screw tabs having screw securingholes disposed therein. Further, a plurality of screw members areprovided to be inserted via the screw securing holes of the plurality ofconnector screw tabs of each of the separate semi-circular non-rotatingring members to securely attach each of the separate semi-circularnon-rotating ring members directly to and inward of the outer peripheraledge of the rotary disk in the same manner as the annular non-rotatingring of the first embodiment as discussed above.

Each of the separate semi-circular non-rotating ring members having asemi-annular upper and lower radial extending clip fastening memberswith an outward forward end having a tapered or bevel portion and topand bottom radial portions thereof. A fastening cavity is disposed belowthe top radial portion and above the bottom radial portion of each ofthe semi-annular upper and lower radial extending clip fastening membersin the same manner as discussed above for the first embodiment. Thefront outer face surface of each one of the separate semi-circularnon-rotating ring members include an annular self-lubricating bearingrail and spacer member disposed along an intermediate portion thereof,and opposite the one end of the non-rotating arm that is attached to theintermediate rear inner face surface of each one of the separatesemi-circular non-rotating ring members and the annular self-lubricatingbearing rail and spacer members disposed along intermediate front outerface surfaces thereof, in the same manner as discussed above for thefirst embodiment.

In order to not be redundant, the aforementioned discussion of thesecond member and how it is attached to the annular non-rotating ring ofthe first embodiment is the same as the second member and how it isattached to the at least a pair of separate semi-circular non-rotatingrings that abuts one another defining a single annular member of thesecond embodiment that utilizes the same fastening clip arrangement forsecuring the same second member to each one of the annular non-rotaryrings of the first and second embodiments. Another object of the presentinvention is to provide the annular self-lubricating bearing rail andspacer member of the annular non-rotary ring of the first embodiment andthe annular self-lubricating bearing rail and spacer member of the atleast a pair of semi-circular nonrotary rings of the second embodimentcomprising a plurality of self-lubricating ball bearings disposedtherein.

In one bearing illustration, the annular self-lubricating bearing railand spacer member of the annular non-rotary ring of the first embodimentand the annular self-lubricating bearing rail and spacer member of theat least a pair of semi-circular non-rotary rings of the secondembodiment includes a top surface, a bottom surface, and a front surfaceincluding an annular channel or cavity in the annular non-rotary ring ofthe first embodiment and a channel or cavity in each of thesemi-circular non-rotary rings to receive a plurality of spaced apartball bearings therein with a portion of the ball bearings extendingpartially outward thereof and partially inward of the annular channel orcavity of the annular non-rotary ring and each of the semi-circularcavity of the semi-circular non-rotary rings. The plurality of spacedapart ball bearings can be selected from a group consisting of aplurality of bearing races with a plurality of spaced apart ballbearings disposed therein or having a plurality of separate and spacedapart ball bearings. Note that the plurality of bearing races and theplurality of separate and spaced apart ball bearings can be loosely snapfitted within the annular channel or cavity of the annular non-rotaryring and each of the semi-circular cavity of the semi-circularnon-rotary rings for easy movement therein.

In another bearing illustration, the front surface of the annularself-lubricating bearing rail and spacer member of the annularnon-rotary ring of the first embodiment and the annular self-lubricatingbearing rail and spacer member of the at least a pair of semi-circularnon-rotary rings of the second embodiment includes a plurality ofseparate and spaced apart holes or cavities that receives a ball bearingmember therein. The ball bearing members can be loosely snap fittedwithin each of the plurality of separated and spaced apart holes orcavities for easy movement therein.

A further bearing illustration, shows that the rear inner face surfaceof the second member, the annular free-rotating bearing cover guidering, includes an annular channel disposed thereon for receiving thedifferent ball bearing arrangements when the second member is secured tothe upper and lower radial extending clip fastening members of the firstmember by upper and lower fastening clips of the annular free-rotatingbearing cover guide ring. This fastening arrangement causes the rearinner face surface of the free-rotating bearing cover guide ring memberto engage and move along the different ball bearing arrangements when aprime mover rotates the rotary finishing disk or stabilizer with thereplacement finishing blades attached thereto for smoothly finishing aconcrete or viscous material surface.

Note that the annular non-rotary ring of the first embodiment and thesemi-circular non-rotary ring members of the second embodiment, and thesecond member, the free-rotating bearing cover guide ring member ispreferably made from self-lubricating plastics, such as Teflon. Otherself-lubricating material may be selected from other plastics such asDelrin, a non-metal, such as, carbon graphite, metals fabricated withvarious self-lubricating coatings, one such as molybdenum disulphide(MoS2) with PTFE could be used, if desired.

This self-lubricating plastic, such as Teflon will allow thefree-wheeling bearing cover guide ring member to easily rotate relativeto the annular non-rotary ring of the first embodiment and the annularnon-rotary ring defined by the at least a pair of semi-circularnon-rotary ring members of the second embodiment and the second memberin one direction when it engages a wall structure or an obstruction androtate in an opposite direction when it moves away from the wallstructure or the obstruction during a viscous material finishingoperation. Also, this free-wheeling bearing cover guide ring member isdesigned to overcome and destabilize forces that can cause vibration andwobbling of a mini-powered trowel device as the cover guide ring engagesa wall structure, and any upstanding obstructions such as electrical andplumbing stubbs, while preventing damage or marking thereto.

It is to be understood that the stabilizer for attaching the pluralityof replacement finishing blades thereto is not limited to a rotaryfinishing stabilizer or disk. The stabilizer can be selected from othertypes of attachment members for securing the plurality of replacementfinishing blades thereto, such as, a spider member, a plurality of barmembers, or a plurality of radial extending arm members, if desired.Note that the spider member, a plurality of bar members, or a pluralityof radial extending arm members have open spaces there between. However,the rotary finishing disk of the present invention and is the selectedand preferred stabilizer member for the plurality of replacementfinishing blades because of the following benefits. The benefits of therotary finishing stabilizer or disk over the other types of stabilizermembers are 1) provides no open spaces that would allow concrete orother viscous type material to fly upward there through towards a user,and 2) the non-open spaces of the rotary finishing disk eliminates auser's clothing, long hair, or other items from being entangled with theplurality of replacement finishing blades to prevent major injuries to auser.

Additional aspects, objectives, features and advantages of the presentinvention will become better understood with regard to the followingdescription and the appended claims of the preferred embodiments withreference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention may be better understood, along with its numerousobjects, features, and advantages made apparent to those skilled in theart by referencing the accompanying drawings.

FIG. 1 illustrates a perspective view of a prior art surface finishingreplacement blade having a pair of screw securing holes according to thepresent invention.

FIG. 2 illustrates a perspective view of a surface finishing replacementblade having a pair of adjustable elongated screw securing slots of afirst embodiment according to the present invention.

FIG. 2A illustrates a perspective view of a surface finishingreplacement blade having a pair of adjustable arcuate or bow-shapedelongated screw securing slots of a second embodiment according to thepresent invention.

FIG. 3A illustrates a perspective bottom view of a selective sizedsurface finishing rotary stabilizer or disk with at least three equallyspaced replacement blades secured thereto by a pair screw members via apair of adjustable elongated screw securing slots of a first embodimentaccording to the present invention.

FIG. 3B illustrates a perspective bottom view of a selective sizedsurface finishing rotary stabilizer or disk with at least three equallyspaced replacement blades secured thereto by a pair of screw members viaa pair of adjustable arcuate or bow-shaped elongated screw securingslots of a second embodiment according to the present invention.

FIG. 4A illustrates a perspective bottom view of a selective sizedsurface finishing rotary stabilizer or disk with at least four equallyspaced replacement blades secured thereto by a pair of screw members viaa pair of adjustable elongated screw securing slots of a firstembodiment according to the present invention.

FIG. 4B illustrates a perspective bottom view of a selective sizedsurface finishing rotary stabilizer or disk with at least four equallyspaced replacement blades secured thereto by a pair of screw members viaa pair of adjustable arcuate or bow-shaped elongated screw securingslots of a second embodiment according to the present invention.

FIG. 5A illustrates a cut sectional side view of a free-wheeling bearingguide ring assembly having an annular non-rotary ring with a pluralityof spaced apart non-rotating arm members and a plurality of integralconnector screw tabs secured to a rotary surface finishing stabilizer ordisk and an annular free-rotating bearing cover guide ring fastenedthereto and freely movable along a bearing rail and spacer member of theannular non-rotary ring of a first embodiment according to the presentinvention.

FIG. 5B illustrates a cut sectional side view of a free-wheeling bearingguide ring assembly having plurality of spaced apart non-rotating armmembers and a plurality of integral connector screw tabs secured to arotary surface finishing stabilizer or disk and an annular free-rotatingbearing cover guide ring fastened thereto and freely movable along abearing rail and spacer member of the annular non-rotary ring of asecond embodiment according to the present invention.

FIG. 5C illustrates a bottom perspective view of a free-wheeling bearingguide ring assembly with a plurality of replacement blades secured to arotary surface finishing stabilizer or disk at a selective peripheraledge thereof via a pair of adjustable arcuate or bow-shaped elongatedslots according to the present invention.

FIG. 6A illustrates a cut sectional side view of a free-wheeling bearingguide ring assembly having an annular non-rotary ring with a pluralityof spaced apart non-rotating arm members and a plurality of integralconnector screw tabs secured to a rotary surface finishing stabilizer ordisk and an annular free-rotating bearing cover guide ring fastenedthereto and freely movable along a plurality of spaced apart bearingmembers disposed within an annular channel in a front outer face surfaceof the non-rotary ring and along an annular channel in an inner facesurface of the free-rotating bearing cover guide ring of a firstembodiment according to the present invention.

FIG. 6B illustrates an exploded cut sectional side view of afree-wheeling bearing guide ring assembly having an annular non-rotaryring with a plurality of spaced apart non-rotating arm members aplurality of connector screw tabs secured to a rotary surface stabilizeror disk and an annular free-rotating bearing cover guide ring fastenedthereto and freely movable along a plurality of spaced apart bearingmembers disposed within an annular channel in a front outer face surfaceof the non-rotary ring and along an annular channel in an inner facesurface of the free-rotating bearing cover guide ring of a firstembodiment according to the present invention.

FIG. 6C illustrates an exploded cut sectional side view of afree-wheeling bearing guide ring assembly having an annular non-rotaryring with a plurality of spaced apart non-rotating arm members aplurality of connector screw tabs secured to a rotary surface finishingstabilizer or disk and an annular free-rotating bearing cover guide ringfastened thereto and freely movable along a plurality of spaced apartbearing members disposed within a plurality of spaced apart bearingopenings in a front outer face surface of the non-rotary ring and alongan annular channel in an inner face surface of the free-rotating bearingcover guide ring of a second embodiment according to the presentinvention.

FIG. 7 illustrates a perspective view of a free-wheeling bearing guidering assembly connected to a prime mover for smoothly finishing aconcrete or viscous material surface around upstanding obstructionsdisposed therein with a free-wheeling bearing guide ring assemblyconnected to a rotary finishing disk or stabilizer by the prime mover, atool extension, and a coupling member operated by a user according tothe present invention.

FIG. 7A illustrates a cut-out sectional view of an unsmoothed areaaround an upstanding obstruction member disposed within a concrete orviscous material surface according to present invention.

FIG. 7B illustrates a cut-out sectional view of a smoothed area aroundan upstanding obstruction member disposed within a concrete or viscousmaterial surface that has been smoothly finished by a rotary stabilizeror disk having replacement blades with a free-wheeling bearing guidering assembly attached thereto according to present invention.

FIG. 7C illustrates a cut-out sectional view of a free-wheeling bearingguide ring assembly connected to a prime mover for smoothly finishing aconcrete or viscous material surface around upstanding obstructionsdisposed therein with the free-wheeling bearing guide ring assemblyconnected to a rotary finishing disk or stabilizer by a coupling memberaccording to the present invention

FIG. 8A illustrates a perspective top view of an annular non-rotary ringwith a plurality of spaced apart non-rotating arm members and aplurality of integral connector screw tabs secured to a rotary surfacefinishing stabilizer or disk according to the present invention.

FIG. 8B illustrates a perspective exploded top view of a pair ofsemi-circular non-rotary ring with a plurality of spaced apartnon-rotating arm members and a plurality of integral connector screwtabs secured to a rotary surface finishing disk according to the presentinvention.

DETAILED DESCRIPTION

The present invention defines a surface finishing tool with a rotarysurface finishing stabilizer or disk with a plurality of replacementblades having a pair of adjustable and elongated slots for adjusting theplurality of replacement blades near a peripheral edge of the rotarysurface finishing stabilizer or disk and a near a peripheral edge of afree-wheeling bearing guide ring assembly when attached to the rotarysurface finishing stabilizer or disk, which will be discussed in greaterdetail below.

As shown in FIG. 1 , a prior art surface finishing replacement bladeunit being designated as 10 includes a replacement blade member 11having a surface contact portion 12, an intermediate angular portion 13that extends from the surface contact portion 12, and an attachmentportion 15 that is integrally connected and extends angularly away fromthe intermediate portion 13. The attachment portion 14 includes a pairof attachment screw holes 15 disposed therein with a pair of screwmembers 16 and a pair of washers 19. Also, the replacement blade 11further includes a trailing edge 17, and an outer bent edge 18.Attention is directed to FIG. 6, columns 5-8 of U.S. Pat. No. 7,144,194B2, for details of the prior art surface finishing replacement blade 10of the instant application.

FIG. 2 is very similar to the prior art of FIG. 1 as discussed above,except for the uniqueness of the pair of screw holes having an elongatedshape. The surface finishing replacement blade unit being designated as20 includes a replacement blade member 21 having a surface contactportion 22, an intermediate angular portion 23 that extends from thesurface contact portion 22, and an attachment portion 15 that isintegrally connected and extends angularly away from the intermediateportion 13. The attachment portion 24 includes a pair of attachmentscrew slots 25 that is elongated in shape are disposed therein, a pairof screw members 26 to be received within the elongated screw holes 25and a pair of washers 29 to receive the pair of screw members 26. Also,the replacement blade 21 further includes a trailing edge 27, and anouter bent edge 28.

The inventive concept of the elongated shaped screw slots 25 will now bediscussed. These elongated shaped screw slots 25 will allow thereplacement blade member 21 to be selectively adjusted at or near aperipheral edge of a rotary surface finishing disk to are able to finishright at wall structures and around electrical or plumbing stubbobstructions within concrete and other viscous or plastic surfaces,while allowing for smooth finishing at the wall structures and aroundthe electrical or plumbing stubb obstructions, thus eliminating the needfor any additional labor intensive hand finishing.

A further inventive concept of the elongated shaped screw slots 25 isdesigned to allow the replacement blade member 21 to be selectivelyadjusted at or near a peripheral edge of an annular free-wheelingbearing guide ring assembly 50, 60, 70 as referenced in FIGS. 5A-5B and6A-C of the instant application. Note that details of the annularfree-wheeling bearing guide ring assembly 50, 60, 70 will be discussedlater.

The selective adjustment of the screw members 26 within the elongatedslots 25 will allow the replacement blade member 21 to finish right atwall structures and around electrical or plumbing stubb obstructionswithin concrete and other viscous or plastic surfaces, while allowingfor smooth finishing at the wall structures and around the electrical orplumbing stubb obstructions upon the annular free-wheeling bearing guidering assembly 50, 60, 70 engaging the wall structures and the electricalor plumbing stubb obstructions without damaging or marking thereto, thuseliminating the need for any additional labor intensive hand finishing.

Now referring to FIG. 2A, this embodiment is the same as FIG. 2 with thesame reference numerals represented with “a”. The surface finishingreplacement blade unit being designated as 20 a includes a replacementblade member 21 a having a surface contact portion 22 a, an intermediateangular portion 23 a that extends from the surface contact portion 22 a,and an attachment portion 15 a that is integrally connected and extendsangularly away from the intermediate portion 13 a. The attachmentportion 24 a includes a pair of attachment screw slots 25 a having anelongated arcuate or bow shape disposed therein, a pair of screw members26 a to be received within the elongated arcuate or bow-shaped screwslots 25 a and a pair of washers 29 a to receive the pair of screwmembers 26 a. Also, the replacement blade 21 a further includes atrailing edge 27 a, and an outer bent edge 28 a.

In order to not be redundant, the inventive concepts and operation ofFIG. 2A is the same as FIG. 2 as discussed above with the only exceptionbeing that elongated slots 25 and 25 a have different shaped slots.

Note that FIGS. 3A and 3B are identical except that the elongated screwslot reference numeral in FIG. 3A is represented by reference numeral 37and the elongated arcuate or bow-shaped screw slot in 3B is representedby reference numeral 37 b.

FIGS. 3A and 3B shows bottom perspective views of the present invention,which shows a rotary surface finishing stabilizer or disk assembly 30.The rotary surface finishing stabilizer or disk assembly 30 includes arotary surface finishing stabilizer or disk 31 with a bottom surface 32,a concentric power tool shaft attachment passage 32 a that is configuredto fit about an output shaft of a power tool for securing the rotarysurface finishing stabilizer or disk 31 thereto and driving the rotarysurface finishing stabilizer or disk 31, a plurality of selectivelyspaced and adjustable replacement finishing blade members 36, each ofthe plurality of selectively spaced and adjustable replacement finishingblade members 36 having a surface contact portion 34, an intermediateangular portion 34 a that extends from the surface contact portion 34,and an attachment portion 35 that is integrally connected and extendsangularly away from the intermediate portion 34 a. The attachmentportion 35 includes a pair of attachment screw slots 37 that iselongated in shape are disposed therein, a pair of screw members 37 a tobe received within the elongated screw slots 37 to secure the pluralityof selectively spaced and adjustable replacement finishing blade members36 to the rotary surface finishing stabilizer or disk 31. Also, theplurality of selectively spaced and adjustable replacement blade members36 further includes a trailing edge 38, and an outer bent edge 39.

To not be redundant, FIG. 3B as stated above is the same as FIG. 3Aexcept for the shapes of the elongated shaped slots 37 and 37 b. Theelongated slot in FIG. 3B shows an arcuate or a bow-shaped screw slot.Note that the reference numerals are identical to the ones described inFIG. 3A. Therefore, a description of FIG. 3B is not deemed necessarysince the same information has been fully described above in FIG. 3A.

However, the inventive concept of the elongated shaped screw slots 37will now be discussed. These elongated shaped screw slots 37 will allowthe replacement blade member 36 to be selectively adjusted at or near aperipheral edge of a rotary surface finishing stabilizer or disk inorder to finish right at wall structures and around electrical orplumbing stubb obstructions within concrete and other viscous or plasticsurfaces, while allowing for smooth finishing at the wall structures andaround the electrical or plumbing stubb obstructions, thus eliminatingthe need for any additional labor intensive hand finishing.

A further inventive concept of the elongated shaped screw slots 37 andthe arcuate or bow-shaped screw slots 37 b are designed to allow thereplacement blade members 36 to be selectively adjusted at or near aperipheral edge of an annular free-wheeling bearing guide ring assembly50, 60, 70 as referenced in FIGS. 5A-5B and 6A-C of the instantapplication. Note that details of the annular free-wheeling bearingguide ring assembly 50, 60, 70 will be discussed later below.

The selective adjustment of the screw members 37 a within the elongatedshaped screw slots 37 and the arcuate or bow-shaped screw slots 37 bwill allow the replacement blade members 36 to finish right at wallstructures and around electrical or plumbing stubb obstructions withinconcrete and other viscous or plastic surfaces, while allowing forsmooth finishing at the wall structures and around the electrical orplumbing stubb obstructions upon the annular free-wheeling bearing guidering assembly 50, 60, 70 engaging the wall structures and the electricalor plumbing stubb obstructions without damaging or marking thereto, thuseliminating the need for any additional labor intensive hand finishing.

FIGS. 4A and 4B are identical except that the elongated screw slotreference numeral in FIG. 3A is represented by reference numeral 47 andthe elongated arcuate or bow-shaped screw slot in 3B is represented byreference numeral 47 b.

Note that FIGS. 4A and 4B shows bottom perspective views of the presentinvention, which shows a rotary surface finishing disk assembly 40. Therotary surface finishing stabilizer or disk assembly 40 includes arotary surface finishing stabilizer or disk 41 with a bottom surface 42,a concentric power tool shaft attachment passage 42 a that is configuredto fit about an output shaft of a power tool for securing the rotarysurface finishing stabilizer or disk 41 thereto and driving the rotarysurface finishing stabilizer or disk 41, a plurality of selectivelyspaced and adjustable replacement finishing blade members 46, each ofthe plurality of selectively spaced and adjustable replacement finishingblade members 36 having a surface contact portion 44, an intermediateangular portion 44 a that extends from the surface contact portion 44,and an attachment portion 45 that is integrally connected and extendsangularly away from the intermediate portion 44 a. The attachmentportion 45 includes a pair of attachment screw slots 37 that iselongated in shape are disposed therein, a pair of screw members 47 a tobe received within the elongated shaped screw slots 47 and the elongatedarcuate or bow-shaped screw slots 47 b to secure the plurality ofselectively spaced and adjustable replacement finishing blade members 46to the rotary surface finishing stabilizer or disk 41. Also, theplurality of selectively spaced and adjustable replacement blade members36 further includes a trailing edge 48, and an outer bent edge 49.

Details of FIG. 4B will not be discussed since it is the same as FIG. 4Aexcept for the elongated arcuate or bow-shaped screw slots 47 b toeliminate redundancy and the number of selectively spaced and adjustablereplacement finishing blade members 46 secured to the rotary surfacefinishing disk 41. Note that the inventive concept and purpose for theelongated arcuate or bow-shaped screw slots 47 b is the same asdiscussed above for the elongated screw slots in FIGS. 2, 3A and 4A.

Another inventive concept as shown in FIGS. 3A, 3B, 4A and 4B is thatthe rotary surface finishing stabilizers or disks 31 and 41 can be ofdifferent selective sizes and adaptable to accommodate a differentnumber of selectively spaced and adjustable replacement finishing blademembers 36 and 46.

In addition, the selective positions of the plurality of screw members47 a in FIG. 4B are designed to accommodate for any slightly offsetmanufactured screw holes 51 c (see FIGS. 8A and 8B) in the rotarysurface finishing disk 41. Therefore, if the manufactured screw holes 51c are slightly offset they can easily line up with the elongated shapedscrew slots 25, 37 and 47 as shown in FIGS. 2, 3A and 4A and theelongated arcuate or bow-shaped screw slots 25 a, 37 b and 47 b as shownin FIGS. 2A, 3B, 4B and 5C in order for the plurality of screw members26, 26 a, 37 a and 47 a as shown in FIGS. 2A, 3B, 4B and 5C to easilypass there through and into the manufactured screw holes 51 c. Such analignment will allow the plurality of selectively spaced and adjustablereplacement finishing blade members 21, 21 a 36 and 46 to be secured andselectively positioned near or at the peripheral edge of the rotarysurface finishing stabilizers or disks 31, 41, 51 and 61 to achieve asmooth finish over a concrete and other viscous or plastic surfaces, aswell as, finishing smoothly along wall structures and around electricalor plumbing stubb obstructions within concrete and other viscous orplastic surfaces, thus eliminating extensive hand labor with a handtrowel by a user or worker.

It is to be noted that the above offset alignment accommodation betweenthe screw holes 51 c and the elongated shaped screw slots 25, 37 and 47and the elongated arcuate or bow-shaped screw slots 25 a, 37 b and 47 beliminates a user from having to replace a rotary finishing stabilizeror disk due to any offset manufactured holes 51 c, whereby a user wouldhave to replace a rotary finishing stabilizer or disk with the pair ofsingle-type screw holes 15 of the plurality of spaced apart replacementfinishing blades 21 as shown in the prior art as illustrated above inFIG. 1 .

Another inventive concept of the present invention provides the screwmembers 26, 26 a, 37 a and 47 a as shown in FIGS. 2A, 3B, 4B and 5C witha selective fine pitch thread. The selective fine thread screw members26, 26 a, 37 a and 47 a extend through the rotary finishing disks 31,41, 51 and 61 at a selective distance at a top portion thereof that willprevent debris, concrete, and other viscous or plastic material frompenetrating into the threaded screw holes 51 c of the rotary finishingstabilizers or disks 31, 41, 51 and 61 and preventing damage to thethreads that can cause loosening and wobbling of the plurality ofselectively spaced and adjustable replacement finishing blade members21, 21 a 36 and 46 relative to the rotary finishing stabilizers or disks31, 41, 51 and 61.

FIG. 5A illustrates a cut sectional side view of a free-wheeling bearingguide ring assembly 50 having a first member as an annular non-rotaryring 53 with a plurality of spaced apart non-rotating arm members 52with a forward end defining a clip fastening structure 52 a, and a rearend defining a plurality of integral connector screw tabs 52 d with ascrew opening 52 c disposed therein for securing the plurality of spacedapart non-rotating arm members 52 to a rotary surface finishingstabilizer or disk 51 via a screw opening 58 a disposed therein by ascrew member 58.

Further, the plurality of spaced apart non-rotating arm members 52 areangled upward from a bent point 52 b at a front end of the integralconnector tabs 52 d to a rear end face defined by an upper portion 53 band a lower portion 53 b′ at an intermediate intersecting location ofthe clip fastening structure 52 a. This intermediate intersectinglocation defines an upper radial extending clip fastening member 54 andlower radial extending clip fastening member 54′ of the clip fasteningstructure 52 a, which are identical. The upper radial extending clipfastening member 54 includes a top end portion 54 b, an outward taperedor bevel rear end portion 54 a, and a bottom end portion 54 c extendinginward from the outward tapered or bevel rear end portion 54 a.

Note that the lower radial extending clip fastening member 54′ is thereverse or flip position of the upper radial extending clip fasteningmember 54. Therefore, the lower radial extending clip fastening member54′ includes a top end portion 54 c′, an outward tapered or bevel rearend portion 54 a′, and a bottom end portion 54 b′ extending inward fromthe outward tapered or bevel rear end portion 54 a′ extending towardsthe front end 51 a of the rotary finishing disk or stabilizer butselectively spaced from the peripheral edge of the front end 51 a. Thepurpose for the selectively spacing will be discussed in greater detaillater.

Between the upward angled plurality of spaced apart non-rotating armmembers 52 and the rotary finishing stabilizer or disk 51 an openclearance space 59 is formed therebetween. The lower radial extendingclip fastening member 54′ is disposed within the open clearance space59. Therefore, the bottom end portion 54 b′ is positioned within theopen clearance space 59 at a selective distance above the top portion ofthe rotary finishing stabilizer or disk 51 creating a clearance gap 59 atherebetween.

Further, the annular non-rotary ring 53 includes a front outer facesurface 53 a. The front outer face surface 53 a of the annularnon-rotating ring 53 having an annular self-lubricating bearing railspacer member 55 disposed along an intermediate portion thereof, andopposite the integral end of the non-rotating arm 52 that is attached tothe intermediate rear end face defined by the upper portion 53 b and alower portion 53 b′ at the intermediate intersecting location of theclip fastening structure 52 a.

A free-wheeling bearing guide ring assembly 50 of the present inventionhaving a second member including an upper clip member and a lower clipmember that are removably attached to the clip fastening structure 52 afor free movement there along in different directions about the annularnon-rotating ring 53 at its upper and lower ends thereof.

Further in FIG. 5A, the upper clip member of the free-wheeling bearingguide ring assembly 50 includes a second member defined as an annularfree-rotating bearing cover guide ring 56. The upper clip member of theannular free-rotating bearing cover guide ring 56 having an annular topouter portion 56 a, an annular top inner portion 56 j, an annular bottomend portion 56 d, an annular bottom inner end portion 56 f, an annularfront outer face portion 56 h, an annular rear inner face portion 56 i,an annular tapered or bevel rear outer end portion 56 b, and an annulartapered or bevel rear inner end portion 56 c forming an annular clipfastening device. The annular top outer portion 56 a extends radiallyfrom the front outer face portion 56 h and the annular rear inner faceportion 56 i and outwardly connected to the annular tapered or bevelouter rear end portion 56 b and the annular tapered or bevel inner rearend portion 56 c, and the annular bottom outer end portion 56 dextending inward from the annular outer tapered or bevel end portion 56b and the annular bottom inner end portion 56 f to a bead fasteningmember 56 e.

The lower clip member of the annular free-rotating bearing cover guidering 56 is a reverse orientation of the upper clip member of the annularfree-rotating bearing cover guide ring 56. This means that the annulartop outer portion 56 a of the upper clip member represents the bottomouter end portion 56 a′ of the lower clip member and the bottom outerend portion 56 d of the upper clip member represents the annular topouter portion 56 d′. Therefore, the referenced elements of the lowerclip member will now be discussed.

In FIG. 5A, the lower clip member of the annular free-rotating bearingcover guide ring 56 having an annular top outer portion 56 d′, anannular top inner portion 56 f, an annular bottom outer end portion 56a′, an annular bottom inner end portion 56 j′, an annular front outerface portion 56 h, an annular rear inner face portion 56 i, an annulartapered or bevel rear outer end portion 56 b′, and an annular tapered orbevel rear inner end portion 56 c′ forming an annular clip fasteningdevice. The annular top outer portion 56 d′ extends radially inward fromthe annular tapered or bevel outer rear end portion 56 b′ and theannular top inner portion 56 f′ extends radially inward from the annulartapered or bevel inner rear end portion 56 c′ to a fastening bead member56 e′. Further, the bottom outer end portion 56 a′ extends radially fromthe front outer face portion 56 h and outwardly connected to the annulartapered or bevel outer rear end portion 56 b′ and the bottom inner endportion 56 j′ extends radially from the front outer face portion 56 hand outwardly connected to the annular tapered or bevel inner rear endportion 56 c′.

In operation, the upper clip member 56 a-56 j of the annularfree-rotating bearing cover guide ring 56 is received over the upperpart of the clip fastening structure 52 a and the upper clip fasteningmember defined by 53 a-53 b, and 54-54 j and a lower part of the clipfastening structure 52 a and the lower clip fastening member defined by53 a′-53 b′ and 54′-54 j′. When this fastening takes place, the upperfastening bead member 56 e of the annular free-rotating bearing coverguide ring 56 will snap underneath and engage the upper bottom endportion 54 c of the annular non-rotary ring 53 and the lower fasteningbead member 56 e′ of the annular free-rotating bearing cover guide ring56 will snap over and engage the lower top end portion 54 c′ of theannular non-rotary ring 53. Once this happens, the rear inner facesurface 56 i of the annular free-rotating bearing cover guide ring 56encloses the front outer face surface 53 a of the annular non-rotatingring 53 and the clip fastening structure 52 a and engages the annularbearing rail spacer member 55 of the annular non-rotary ring 53.

The engagement of the annular free-rotating bearing cover guide ring 56against the annular bearing rail spacer member 55 of the annularnon-rotary ring 53 forms annular space 57 between the front outer facesurface 53 a of the annular non-rotating ring 53, the rear inner facesurface 56 i of the annular free-rotating bearing cover guide ring 56,the upper part of the clip fastening structure 52 a and the upper clipfastening member defined by 53 a-53 b, and 54-54 j and a lower part ofthe clip fastening structure 52 a and the lower clip fastening memberdefined by 53 a′-53 b′ and 54′-54 j′. This space allows the annularfree-rotating bearing cover guide ring 56 to rotate freely without anybinding around and along the non-rotary ring 53. Also, the annularfree-rotating bearing cover guide ring 56 is able to rotate freely indifferent direction around along the non-rotary ring 53 when the annularfree-rotating bearing cover guide ring 56 abuts or engages a wallstructure, and plumbing or electrical obstructions upstanding in aconcrete or viscous material surface during a concrete or viscousmaterial smoothing and finishing operation. This abutment or engagementof the annular free-rotating bearing cover guide ring 56 against a wallstructure, and plumbing or electrical obstructions eliminates markingsor damage thereto.

The dimension of the clearance gap 59 a formed between the bottom endportion 54 b′ and the top portion of the rotary finishing stabilizer ordisk decreases after the annular free-rotating bearing cover guide ring56 is fastened to the annular non-rotary ring 53, but the decrease inthe dimension of the clearance gap 59 a will still be sufficient toprevent the annular free-rotating bearing cover guide ring 56 fromhitting the top of the rotary finishing stabilizer or disk 51 during aconcrete or viscous material smoothing operation.

FIG. 5B illustrates a cut sectional side view of a free-wheeling bearingguide ring assembly 50 having plurality of spaced apart non-rotating armmembers 52 and a plurality of integral connector screw tabs 52 d securedto a rotary surface finishing stabilizer or disk 51 and an annularfree-wheeling bearing cover guide ring 56 fastened thereto and freelymovable along a self-lubricating bearing rail and spacer member 55 ofthe annular non-rotary ring 53 of a second embodiment according to thepresent invention.

Note that FIG. 5B is identical to FIG. 5A as explained above except thateach one of the bottom end portion 54 c of the upper radial extendingclip fastening member 54 and the top end portion 54 c′ of the lowerradial extending clip fastening member 54′ includes an annular channelor groove 54 d and 54 d′, respectively, within the annular non-rotaryring 53 and the clip fastening structure 52 a to snap fit the fasteningbead member 56 e and 56 e′ therein to allow the annular free-wheelingbearing cover guide ring 56 to rotate freely along and around theannular non-rotary ring 53 without any binding. Therefore, no additionalinformation is necessary for explanation purposes since 5B is the sameas 5A as stated above. All of the reference elements are the same exceptfor the above exception.

Now referring to FIG. 5C, which illustrates a bottom perspective view ofthe free-wheeling bearing guide ring assembly 60 with a plurality ofreplacement blades 21 a secured to a rotary surface finishing stabilizeror disk 61 at a selective peripheral edge thereof via a pair ofadjustable arcuate or bow-shaped elongated slots 25 a according to thepresent invention. The rotary surface finishing stabilizer or disk 61includes a concentric power tool shaft attachment passage 62 a that isconfigured to fit about an output shaft of a power tool 82 (see FIG. 7 )for securing the rotary surface finishing stabilizer or disk 61 theretoand driving the rotary surface finishing stabilizer or disk 61, aplurality of selectively spaced and adjustable replacement finishingblade members 21 a, each of the plurality of selectively spaced andadjustable replacement finishing blade members 21 a having a surfacecontact portion 22, an intermediate angular portion 23 that extends fromthe surface contact portion 22, and an attachment portion 24 a that isintegrally connected and extends angularly away from the intermediateportion 23.

The attachment portion 24 a includes a pair of elongated arcuate orbow-shaped attachment screw slots 25 a disposed therein, a pair of screwmembers 26 a to be received within the elongated arcuate or bow-shapedattachment screw slots 25 a to secure the plurality of selectivelyspaced and adjustable replacement finishing blade members 21 a to therotary surface finishing stabilizer or disk 61. Also, the plurality ofselectively spaced and adjustable replacement blade members 21 a furtherincludes a trailing edge 27 a, and an outer bent edge 28 a. As shown inFIG. 5C, the plurality of selectively spaced and adjustable replacementfinishing blade members 21 a having the bent edge 28 a selectivelyadjusted at or near the peripheral edge of the annular free-rotatingbearing cover guide ring 56 to allow smooth finishing at wallstructures, and electrical and plumbing stubs upon the annularfree-rotating bearing cover guide ring 56 engaging or abutting againstthe wall structures, and electrical and plumbing stubs without causingany damage and markings thereto.

FIGS. 6A-6C are very similar to FIGS. 5A-5B, except for having annularself-lubricating bearing rail and spacer arrangements of FIGS. 6A-6Cthat are different from the annular self-lubricating bearing rail andspacer member 55 as shown in FIGS. 5A-5B. In FIGS. 6A and 6B, theself-lubricating bearing and spacer member is defined by an annularchannel or groove 71 in the annular front face 53 a of the annularnon-rotary ring 53 that can receives at least a bearing rail with aplurality of spaced apart self-lubricating bearings 72, a plurality ofbearing rails with a plurality of self-lubricating bearings 71 disposedtherein, or a plurality of spaced apart self-lubricating bearings 71snap-fitted within the annular channel or groove 71 in the annular frontface 53 a of the annular non-rotary ring 53. Also, the inner rear face56 i of the annular free-wheeling bearing cover guide ring 56 includesan annular channel or groove 73 that receives the outer portion of theself-lubricating bearings 71 that acts as a bearing rail and spacermember.

The exploded view of FIG. 6C shows a bearing rail and spacer member 55with a plurality of spaced apart holes 55 a disposed therein forreceiving a self-lubricating bearing in each one of the plurality ofspaced apart holes 55 a. Also, the inner rear face 56 i of the annularfree-wheeling bearing cover guide ring 56 includes an annular channel orgroove 73 that receives the outer portion of the self-lubricatingbearings 55 a that acts as a bearing rail and spacer member.

FIG. 7 illustrates a perspective view of a free-wheeling bearing guidering assembly 80 connected to a prime mover 82 including an extensionmember 83 and an adapter 84 that is connected a shaft attachment passage89 of an annular rotary surface finishing stabilizer or disk 51 with aplurality of spaced apart non-rotating arm members 52 and a plurality ofintegral connector screw tabs 52 d secured to a rotary surface finishingdisk or stabilizer 51 and an annular free-rotating bearing cover guidering 56 fastened thereto for smoothly finishing a concrete or viscousmaterial surface 86 around upstanding plumbing and/or electricalobstructions 85 disposed therein as the free-rotating bearing guide ring56 abuts against the upstanding plumbing or electrical obstructions 85during the concrete or viscous material finishing operation by a user81. This free-wheeling bearing guide ring assembly 80 eliminates theuser 81 from ever using labor intensive hand trowels to smoothly finishthe concrete or viscous material surface 86.

FIG. 7A shows a cut-out sectional view of an unsmoothed area 87 aroundan upstanding plumbing or electrical obstruction 85 disposed within aconcrete or viscous material surface 86 when labor intensive hand troweldevices or other power tools that are used and not the free-wheelingbearing guide ring assembly 80 of FIG. 7 .

FIG. 7B shows a cut-out sectional view of a smoothed area 88 around theupstanding plumbing or electrical obstruction 85 disposed within aconcrete or viscous material surface 86 that has been smoothly finishedby the free-wheeling bearing guide ring assembly 80 of FIG. 7 .

FIG. 7C illustrates a larger cut-out sectional view of the free-wheelingbearing guide ring assembly 80 connected to an adapter 84 that isconnected to a shaft attachment passage 89 of an annular rotaryfinishing stabilizer or disk 51 with a plurality of spaced apartnon-rotating arm members 52, a plurality of integral connector screwtabs 52 d, and a screw member assembly 58, 58 a (for a better view, seeFIGS. 5A-5B and 6A-6C) secured to a rotary surface finishing stabilizeror disk 51 and an annular free-rotating bearing cover guide ring 56fastened thereto for smoothly finishing a concrete or viscous materialsurface 86 around an upstanding plumbing or electrical obstruction 85disposed therein as the free-rotating bearing guide ring 56 abutsagainst the upstanding plumbing or electrical obstructions 85 during theconcrete or viscous material finishing operation. This free-wheelingbearing guide ring assembly 80 eliminates the user 81 of FIG. 7 fromever using labor intensive hand trowels to smoothly finish the concreteor viscous material surface 86.

FIG. 8A illustrates a perspective top view of a free-wheeling bearingguide ring assembly 50 having a first member as an annular non-rotaryring 53 with a plurality of spaced apart non-rotating arm members 52with a forward end defining a clip fastening structure 52 a, and a rearend defining a plurality of integral connector screw tabs 52 d with ascrew opening 52 c (see FIGS. 5A, 5B, and 6A-6C) disposed therein forsecuring the plurality of spaced apart non-rotating arm members 52 to arotary surface finishing disk 51 or stabilizer via a screw opening 58 a(see FIGS. 5A, 5B, and 6A-6C) disposed therein by a screw member 58.

Further, the plurality of spaced apart non-rotating arm members 52 areangled upward from a bent point 52 b at a front end of the integralconnector tabs 52 d to the clip fastening structure 52 a integrallyattached to the annular non-rotary ring 53. 53 a represents the frontface of the annular non-rotary ring 53.

FIG. 8B illustrates a perspective exploded top view of a free-wheelingbearing guide ring assembly 50 having a pair of semi-circular non-rotaryrings 53 with a plurality of spaced apart non-rotating arm members 52and a plurality of integral connector screw tabs 52 d with a screwopening 52 c (see FIGS. 5A, 5B, and 6A-6C) disposed therein theplurality of spaced apart non-rotating arm members 52 to a rotarysurface finishing stabilizer or disk 51 via a screw opening 58 a (seeFIGS. 5A, 5B, and 6A-6C) disposed therein by a screw member 58. A pairof semi-circular pair free-wheeling bearing cover guide rings 56fastened to the pair of semi-circular non-rotary rings 53 forming a pairof ends 52 e that abuts one another to form a single a free-wheelingbearing guide ring assembly 50 (see FIGS. 5A-5B). Elements 51 crepresents the screw holes for securing the plurality of spaced apartreplacement blades 21 a of FIG. 5C. Note that any of the replacementblades as shown in FIGS. 2-4B can use screw holes 51 c. The screwmembers 26, 26 a, 37 a, and 47 a (see FIGS. 2-4B, 5C) include a finepitch thread that extends to a certain position within the screw holes51 c to prevent concrete or viscous material from penetrating into thescrew holes 51 c to prevent wear or damage to the fine pitch threads ofthe screw members 26, 26 a, 37 a, and 47 a that would otherwise causethe adjustable replacement blades 21, 21 a, 36, and 46 to wobble orloosely move, whereby a smooth surface finishing would not be possible.

Note that the annular non-rotary ring 53, the annular bearing railspacer member 55, the annular free-rotating bearing cover guide ring 56and the ball bearings are preferably made from self-lubricatingplastics, such as Teflon. Other self-lubricating material may beselected from other plastics such as Delrin, a non-metal, such as,carbon graphite, metals fabricated with various self-lubricatingcoatings, one such as molybdenum disulphide (MoS2) with PTFE could beused, if desired.

It is noted that the plurality of spaced apart non-rotating arm members52 with the integral connector tabs 52 d and the clip fasteningstructure 52 a is formed from varied plastics as a single die-castplastic molded member integral with the annular non-rotary ring 53, orthis single molded member can be attached to the annular non-rotary ring53 by varied bonding types selected from the group consisting ofcements, adhesives, glues, welding, or soldering, if desired. Also, theplurality of spaced apart non-rotating arm members 52 with the integralconnector tabs 52 d and the clip fastening structure 52 a integrallyattached to the annular non-rotary ring 53 can be formed by metalstamping selected from the group consisting of aluminum alloys, brassalloys, copper alloys, nickel alloys, steel, and stainless steel, ifdesired. Further, the plurality of spaced apart non-rotating arm members52 with the integral connector tabs 52 d and the clip fasteningstructure 52 a defining a single member could be attached to the annularnon-rotary ring 53 by varied mechanical fastening means selected fromthe group consisting of screw type members, nut and bolt members,rivets, pins, anchors, and other specialized threaded fasteners, suchas, captive threaded fasteners, stud threaded inserts, and threaded rodsto name just a few. Other types of mechanical fastening means could beutilized, if desired.

While the foregoing written description of the invention enables one ofordinary skill in the art to make and use what is considered presentlyto be the best mode thereof, those of ordinary skill will understand andappreciate the existence of variations, combinations, and equivalents ofthe specific embodiment, method, and examples herein. There, theinvention should not be limited by the above described embodiments, andexamples, but by all embodiments and methods within the scope and spiritof the invention as claimed.

What is claimed is: 1: A mini-concrete trowel attachment assembly comprising: a rotary stabilizing disk, the rotary stabilizing disk having a top surface and a bottom surface with a plurality of spaced apart screw openings extending there through; a plurality of replacement surface finishing blades, the plurality of replacement finishing blades including a front surface contact portion with an upturned outer peripheral edge, an intermediate portion having one end extending from and connected to a rear end of the front surface contact portion at an inclined angle, and a rear flat portion having a front end extending from and connected to the other end of the intermediate inclined angle portion as a single unit; each of the rear flat portions of the plurality of replacement surface finishing blades includes at least a pair of elongated and adjustable securing slots located at a back end thereof for aligning with the plurality of spaced apart screw openings in the rotary stabilizing disk; a plurality of screw members are inserted through the elongated and adjustable securing slots and through the spaced apart screw openings of the rotary stabilizing disk for securing the plurality of replacement surface finishing blades directly to the rotary stabilizing disk at a selective position near and inward of the peripheral edge of the rotary stabilizing disk defining a surface finishing unit; the adjustable securing slots are designed to accommodate rotary stabilizing disks of varied sizes and is capable of securing the plurality of replacement surface finishing blades directly to the rotary stabilizing disks of varied sizes at a selective position near and inward of the peripheral edge of the rotary stabilizing disks of varied sizes; and a prime mover being attached to the surface finishing unit for rotating the rotary stabilizing disk for smoothing and finishing a viscous material surface by the plurality of replacement finishing blades. 2: The mini-concrete trowel attachment assembly according to claim 1, wherein a free-wheeling bearing guide ring assembly is attached directly to and inward of the outer periphery of the rotary stabilizing disk that the replacement finishing blades are secured thereto, the free-wheeling bearing guide ring assembly includes a first member attached inward of and directly around and adjacent the outer periphery of the rotary stabilizing disk, the first member is an annular non-rotating ring member with a plurality of spaced apart non-rotating arm members having one end extending angularly from and attached to an intermediate inner face portion thereof, and the other end having a plurality of connector screw tabs extending there from with screw securing holes disposed therein. 3: The mini-concrete trowel attachment assembly according to claim 2, wherein the plurality of screw members are inserted into the screw securing holes of the plurality of connector screw tabs to securely attach the first member directly to and inward of the outer periphery of the rotary stabilizing disk, an annular first fastening clip attached to the first member at top and bottom portions thereof, the annular first fastening clip extending radially there from with an outward forward end having a tapered portion, and a fastening cavity is disposed below the top radial portion and above the bottom radial portion of the first fastening clips. 4: The mini-concrete trowel attachment assembly according to claim 2, wherein an outer face portion of the first member having an annular self-lubricating bearing rail and spacer member disposed along an intermediate portion thereof, and opposite the one end of the non-rotating arm that is attached to the intermediate inner face portion. 5: The mini-concrete trowel attachment assembly according to claim 4, wherein a second member is defined as an annular free-wheeling bearing cover guide ring member having a front face and a rear face, the front face engages and encloses the outer face portion and the bearing rail spacer member when the second member is secured to the first annular fastening clips of the first member by a plurality of selective spaced apart second fastening clips, the plurality of selective spaced apart second fastening clips having one end attached to and radially extending from the second member at top and bottom portions thereof, an outward forward end having an outer tapered portion, and a lower portion integrally attached to the outer tapered portion with a radially extending outward end defining a latching fastener, such as bead member; and, a fastening cavity is disposed below the top radial portion and above the bottom radial portion of the first fastening clips, and the outer outward forward end of the second member having an inner tapered portion that aligns with and spaced from the tapered portion of the first annular fastening clips at the top and bottom thereof defining a clearance therebetween. 6: The mini-concrete trowel attachment assembly according to claim 5, wherein the plurality of selective spaced apart second fastening clips are received over the outer tapered portion of the top and bottom portions of the first annular fastening clips with the fastening bead member loosely and firmly fitted within the fastening cavity that is disposed below the top radial portion and above the bottom radial portion of the first annular fastening clips that will causes the front face of the annular free-wheeling bearing cover guide ring member to engage and freely move along the annular self-lubricating bearing rail and spacer member when the prime mover rotates the rotary stabilizing disk with the replacement finishing blades for smoothly finishing a viscous material surface. 7: The mini-concrete trowel attachment assembly according to claim 5, the clearance space defined between the inner tapered portions of the plurality of selective spaced apart second fastening clips of the second member and spaced from the tapered portion of the first annular fastening clips at the top and bottom portions is always maintained when the front face of the annular free-rotating bearing cover guide ring member engages the annular self-lubricating bearing rail and spacer member, and this clearance allows for easy rotation without binding as the fastening bead member moves easily and freely within the fastening cavity that is disposed below the top radial portion and above the bottom radial portion of the first annular fastening clips of the first member. 8: The mini-concrete trowel attachment assembly according to claim 2, wherein the first member, the annular non-rotating ring member, comprises at least a pair of separate semi-circular non-rotating ring members having inner and outer face portions, the at least a pair of separate semi-circular non-rotating ring members abuts one another when they are attached to the rotary stabilizing disk forming a single annular non-rotating ring member; each of the separate semi-circular non-rotating ring members of the single annular non-rotating ring member includes a plurality of selectively spaced apart non-rotating arm members having one end extending from and attached to an intermediate inner face portion thereof, and the other end having a plurality of connector screw tabs extending there from with screw securing holes disposed therein; and, the plurality of screw members are inserted at a selected distance into the screw securing holes of the plurality of connector screw tabs for securing each of the separate semi-circular non-rotating ring members directly to and inward of the outer periphery of the rotary disk, each of the separate semi-circular non-rotating ring members of the single annular non-rotating ring member having a semi-annular first fastening clip attached thereto at top and bottom portions thereof, and extending radially there from with an outward forward end having a tapered portion, and a fastening cavity is disposed below the top radial portion and above the bottom radial portion of each of the first fastening clips. 9: The mini-concrete trowel attachment assembly according to claim 8, wherein the outer face portion of each one of the separate semi-circular non-rotating ring members of the single annular non-rotating ring member includes an annular self-lubricating bearing rail and spacer member disposed along an intermediate portion thereof, and opposite the one end of the non-rotating arm that is attached to the intermediate inner face portion of each one of the separate semi-circular non-rotating ring members annular self-lubricating bearing rail and spacer members, and a second member defined as an annular free-wheeling bearing cover guide ring member having a front face and a rear face, the front face engages and encloses the outer face portion and the bearing rail spacer member when the second member is secured to the first annular fastening clips of the first member by a plurality of selective spaced apart second fastening clips. 10: The mini-concrete trowel attachment assembly according to claim 9, wherein the plurality of selective spaced apart second fastening clips having one end attached to and radially extending from the second member at top and bottom portions thereof, an outward forward end having an outer tapered portion, and a lower portion integrally attached to the outer tapered portion with a radially extending outward end defining a latching fastener, such as bead member, a fastening cavity is disposed below the top radial portion and above the bottom radial portion of the first fastening clips, and the outer outward forward end of the second member having an inner tapered portion that aligns with and spaced from the tapered portion of the first annular fastening clips at the top and bottom thereof defining a clearance therebetween; and wherein the plurality of selective spaced apart second fastening clips are received over the outer tapered portion of the top and bottom portions of the first annular fastening clips with the fastening bead member loosely and firmly fitted within the fastening cavity that is disposed below the top radial portion and above the bottom radial portion of the first annular fastening clips that will causes the front face of the free-rotating bearing cover guide ring member to engage and freely move along the annular self-lubricating bearing rail spacer member when a prime mover rotates the rotary disk with the replacement finishing blades for smoothly finishing a viscous material surface. 11: The mini-concrete trowel attachment assembly according to claim 10, wherein the clearance space defined between the inner tapered portions of the plurality of selective spaced apart second fastening clips of the second member and spaced from the tapered portion of the first annular fastening clips at the top and bottom portions is always maintained when the front face of the free-wheeling bearing cover guide ring member engages the annular self-lubricating bearing rail spacer member, whereby this clearance allows for easy rotation without binding as the fastening bead member moves easily and freely within the fastening cavity that is disposed below the top radial portion and above the bottom radial portion of the first annular fastening clips of the first member. 12: The mini-concrete trowel attachment assembly according to claim 11, wherein each one of the separate semi-circular non-rotating ring members of the single annular non-rotating ring member has a semi-circular annular self-lubricating bearing rail and spacer member disposed along an intermediate portion thereof, each one of the semi-circular annular self-lubricating bearing rail and spacer members includes a bearing channel that receives a plurality of spaced apart self-lubricating ball bearings therein; and the rear inner face of the annular free-wheeling bearing cover guide ring member engages the plurality of spaced apart self-lubricating ball bearings when the annular free-wheeling bearing cover guide ring member is secured to the first annular fastening clips of the first member by a plurality of selective spaced apart second fastening clips to allow the annular free-wheeling bearing cover guide ring member to rotate freely along the self-lubricating ball bearings in opposite directions during a surface finishing operation. 13: The mini-concrete trowel attachment assembly according to claim 12, in which the first and second members, and the plurality of ball bearings are made from self-lubricating material selected from the group consisting of self-lubricating plastics, metals fabricated with various self-lubricating coatings, and a non-metal, such as, carbon graphite. 14: An improved mini-concrete trowel attachment apparatus connected to a prime mover tool, comprising: a rotary stabilizer having a top surface and a bottom surface with a plurality of spaced apart screw holes extending there through; a plurality of replacement blades attached to the bottom surface of the rotary stabilizer; the plurality of replacement blades including a front contact smoothing portion with an upturned outer peripheral edge, an intermediate portion having one end extending from and connected to a rear end of the front contact portion at an inclined angle, and a rear flat portion having a front end extending from and connected to the other end by the intermediate inclined angle portion defining a unitary member; each of the rear flat portions of the plurality of replacement blades includes at least a pair of elongated and adjustable securing slots located at a back end thereof for aligning with the plurality of spaced apart screw holes in the rotary stabilizer; a plurality of screw members are inserted through the elongated and adjustable securing slots and through the spaced apart screw holes of the rotary stabilizer for adjustably securing the plurality of replacement blades directly to the rotary stabilizer at a selective position near and inward of a peripheral edge of the rotary stabilizer; and a free-wheeling bearing guide ring assembly being removably attached directly to and inward of the outer periphery of the rotary stabilizer, and the plurality of flexible replacement blades are adjusted along the elongated slot to secure the plurality of replacement blades at a selective position adjacent and inward of the peripheral edge of the free-wheeling bearing guide ring assembly by the plurality of screw members so that the plurality of replacement blades are able to finish closely to wall structures and around electrical and plumbing stubb obstructions that extend through concrete surfaces, and protecting against any damage thereto by the free-wheeling bearing cover guide ring assembly, while eliminating the need for any additional labor intensive hand trowel concrete surface finishing. 15: An improved mini-concrete trowel attachment apparatus connected to a prime mover tool according to claim 14, wherein the elongated slots are designed to allow the adjustment of the plurality of replacement blades to align perfectly with any misaligned manufactured screw holes within the rotary stabilizer with the plurality of screw members, without having to replace the rotary stabilizer in order to accommodate the plurality of replacement blades. 16: An improved mini-concrete trowel attachment apparatus connected to a prime mover tool according to claim 15, wherein the screw members include a selective fine pitch thread, wherein the screw members extend through the rotary stabilizer to a selective distance at the top surface thereof that will prevent debris, concrete, and any other material from penetrating into the screw holes of the rotary stabilizer thus preventing any damage to the fine pitch threads of the screw members that could cause wobbling and shifting of the replacement blades relative to the rotary stabilizer. 17: An improved mini-concrete trowel attachment apparatus connected to a prime mover tool according to claim 14, wherein the free-wheeling bearing cover guide ring assembly includes a first annular non-rotary ring member with an inner face with a plurality of spaced apart attachment members extending there from, an outer face having an annular self-lubricating bearing and spacer member disposed thereon, a second annular free-rotational ring member having an inner face and an outer face, the plurality of spaced apart attachment members further include a plurality of non-rotating arm members having one end extending from and attached to an intermediate inner face portion of the first annular non-rotary ring member, and the other end of the plurality of non-rotating arm members having a plurality of connector screw tabs extending there from with screw securing holes disposed therein and secured to the rotary stabilizer at a selective position inward of the outer peripheral edge thereof by a plurality of attachment screws. 18: An improved mini-concrete trowel attachment apparatus connected to a prime mover tool according to claim 17, wherein the first annular non-rotary ring member includes a first annular fastening clip attached integrally at top and bottom radial portions thereof, the annular first fastening clip extending radially there from with an outward forward end having a tapered portion, and a semi-circular fastening cavity disposed below the top radial portion and above the bottom radial portion of the first annular fastening clip, the annular self-lubricating bearing and spacer member is disposed along an intermediate portion of the outer face of the first annular non-rotary ring member, and opposite the one end of the plurality of non-rotating arms that is attached to the intermediate inner face portion; and the free-wheeling bearing guide ring assembly further includes a second annular free-rotating bearing cover guide ring member having a front face and a rear inner face, the rear inner face engages and moves along the outer face portion and the annular self-lubricating bearing and spacer member when the second annular free-rotating bearing cover guide ring member is secured to the first annular fastening clips of the first annular non-rotary ring member by a plurality of selective spaced apart second fastening clips of the second annular free-wheeling bearing cover guide ring member, upon rotation of the rotary stabilizer disk by the prime mover tool. 19: An improved mini-concrete trowel attachment apparatus connected to a prime mover tool according to claim 18, wherein the plurality of selective spaced apart second fastening clips having one end attached to and radially extending from the second annular free-wheeling bearing cover guide ring member at top and bottom portions thereof, an outward forward end having an outer tapered portion, and a lower portion integrally attached to the outer tapered portion with a radially extending outward end defining a locking fastener, such as bead member; and wherein the outward forward end of the plurality of selective spaced apart second fastening clips having an inner tapered portion that aligns with and spaced from the tapered portion of the first annular fastening clips at the top and bottom portions thereof defining a clearance therebetween, thus the clearance space is always maintained when the front face of the free-rotating bearing cover guide ring member engages the annular self-lubricating bearing and spacer member, whereby this clearance allows for easy rotation without binding as the fastening bead member moves easily and freely within the fastening cavity. 20: An improved mini-concrete trowel apparatus connected to a mover tool according to claim 19, the annular self-lubricating bearing and spacer member includes a front surface with a plurality of spaced apart bearing holes disposed therein, a plurality of self-lubricating ball bearings disposed and snap-fitted loosely within the plurality of spaced apart bearing holes with a portion extending outward thereof, and allowing for a free rotational movement therein; and the rear inner face of the second annular free-rotating bearing cover guide ring includes an annular channel along an intermediate portion thereof that engages and receives the plurality of spaced apart bearings that extend through the spaced apart holes in the outer face portion of the annular self-lubricating bearing and spacer member when the second annular free-rotating bearing cover guide ring member is secured to the first annular fastening clips of the first annular non-rotary ring member by a plurality of selective spaced apart second fastening clips of the second annular free-rotating bearing cover guide ring member, and the second annular free-rotating bearing cover guide ring member is able to move in opposite directions when it engages a wall structure and obstructions disposed within a concrete surface and moves away there from, upon the rotation of the rotary stabilizer disk by the prime mover tool with the adjusted replacement blades finishing the concrete surface right at the wall structure and around the obstructions disposed within the concrete surface, without having to utilize any labor intensive hand trowel finishing. 21: An improved mini-concrete trowel attachment apparatus connected to a prime mover tool according to claim 20, wherein the first annular non-rotary ring member includes at least a pair of separate semi-circular non-rotary ring members joined together by an abutment engagement with one another to form a unitary annular non-rotary ring member when secured to the rotary stabilizer of the at least a pair of separate semi-circular non-rotating ring members of the unitary annular non-rotary ring member having inner and outer face portions, the inner face portion of each of the separate semi-circular non-rotating ring members of the unitary annular non-rotating ring member includes a plurality of selectively spaced apart non-rotating arm members having one end extending from and attached to an intermediate inner face portion thereof, and the other end having a plurality of connector screw tabs extending there from with screw securing holes disposed therein, a plurality of screw members are inserted into the screw securing holes of the plurality of connector screw tabs for securing each of the separate semi-circular non-rotating ring members directly to and inward of the outer periphery of the rotary stabilizer. 22: An improved mini-concrete trowel attachment apparatus connected to a prime mover tool according to claim 21, wherein each of the separate semi-circular non-rotating ring members of the unitary annular non-rotating ring member having a semi-annular first fastening clip attached thereto at top and bottom portions thereof, and extending radially there from with an outward forward end having a tapered portion, and a fastening cavity is disposed below the top radial portion and above the bottom radial portion of each of the first fastening clips; and, the outer face portions of each of the separate semi-circular having an annular self-lubricating bearing and spacer member that engages and moves freely along the second annular free-rotating bearing cover guide ring member when it is secured to the first annular fastening clips of the unitary annular non-rotary ring member by the plurality of selective spaced apart second fastening clips of the second annular free-wheeling bearing cover guide ring member, upon rotation of the rotary stabilizer by the prime mover tool. 23: An improved mini-concrete trowel attachment apparatus connected to a prime mover tool according to claim 22, wherein the first annular non-rotary member, the unitary annular non-rotary member, the second annular free-rotating bearing cover guide ring member, and the plurality of ball bearings are made from self-lubricating material selected from the group consisting of self-lubricating plastics, metals fabricated with various self-lubricating coatings, and a non-metal, such as, carbon graphite. 24: An improved concrete trowel device attached to a hand-operated power tool, the improved concrete trowel device comprising: a rotary disk having a top surface and a bottom surface with a plurality of spaced apart screw holes extending there through; a plurality of flexible replacement blades attached to the bottom surface of the rotary disk; the plurality of flexible replacement blades including a front contact smoothing portion with an upturned outer peripheral edge, an intermediate portion having one end extending from and connected to a rear end of the front concrete contact portion at an inclined angle, and a rear flat portion having a front end extending from and connected to the other end by the intermediate inclined angle portion defining a unitary member; each of the rear flat portions of the plurality of flexible replacement blades includes at least a pair of elongated and adjustable securing slots located at a back end thereof for aligning with the plurality of spaced apart screw holes in the rotary disk; a plurality of screw members are inserted through the elongated and adjustable securing slots and through the spaced apart screw holes of the rotary disk for adjustably securing the plurality of flexible replacement blades directly to the rotary disk at a selective position near and inward of a peripheral edge of the rotary disk; and a free-rotating bearing guide ring assembly being attached directly to and inward of the outer periphery of the rotary disk, and the plurality of flexible replacement blades are adjusted along the elongated slot to secure the plurality of flexible replacement blades at a selective position at and adjacent to the peripheral edge of the rotary disk by the plurality of screw members so that the plurality of flexible replacement blades are able to finish closely to wall structures and around electrical and plumbing stubb obstructions that extend through concrete surfaces, and protecting against any damage thereto by the free-wheeling bearing guide ring assembly, while eliminating the need for any additional labor intensive hand trowel surface finishing. 25: An improved mini-concrete trowel attachment apparatus connected to a prime mover tool according to claim 24, wherein the free-wheeling bearing guided ring assembly includes a first annular non-rotary ring member having an inner face and an outer face, the inner face includes a plurality of spaced apart attachment tabs for securing the first annular non-rotary ring member directly to the rotary disk by a plurality of screw members, the outer face includes an annular self-lubricating bearing rail and spacer member, the first annular non-rotary ring member having a first annular clip fastener, a second free-wheeling bearing cover guide ring member having a plurality of selective spaced apart second clip fasteners. 26: An improved mini-concrete trowel attachment apparatus connected to a prime mover tool according to claim 25, wherein the self-lubricating bearing rail and spacer member engages the second annular free-wheeling bearing cover guide ring member when it is secured to the first annular fastening clips of the first annular non-rotary ring member by the plurality of selective spaced apart second fastening clips of the second annular free-rotating bearing cover guide ring member to allow the second annular free-wheeling bearing cover guide ring member to rotate freely in different directions when the second annular free-rotating bearing cover guide ring member moves against and away from the wall structures and around electrical and plumbing stubb obstructions during concrete surface finishing by the plurality of flexible replacement blades, upon rotation of the rotary disk by the prime mover hand-operated power tool. 